package com.example.app6;


import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import androidx.appcompat.app.AppCompatActivity;


public class UCActivity4 extends AppCompatActivity {

    private Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ucactivity4);
       btn = findViewById(R.id.button_back);
       btn.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View v) {
             finish();
           }
       });
    }
}